en

Products

Field network testing

New Optical Wave Expert - DWDM Channel Checker and OTDR

Lab and manufacturing testing

MOA-3800 - variable optical attenuator

Service assurance

Neptune Intelligent - Virtual Passive Probe

Solutions

Communications service providers

Contractors

Academic and research institutions

Cable MSO (multiple system operator)

Network equipment manufacturers

Webscale companies and data centers

Government

System integrators

Services

Training

Featured Introduction to testing with OTDRs

Field network testing

Brochures and catalogs Be-an-Expert Training Catalog

Lab and manufacturing testing

Brochures and catalogs Be-an-Expert Training Catalog

Service assurance

Brochures and catalogs EXFO Astellia Training Courses

Resources

Technical documentation

Promotional documentation

Legal documentation

Blog

Large-scale 5G network automation relies on accurate real-time topology By Jo Hicks | November 2019
Network Visibility
Network visibility: redefining operational simplicity By Jo Hicks | November 2019
5G Testing Challenges: EXFO solutions for top 5 in 5G networks
5G Testing Challenges: EXFO solutions for top 5 in 5G networks By Astra Baltayan | November 2019
View all

Webinars

Register now

FastReporter fundamentals: How to produce a reflectometry measurements report (WEBINAR IN FRENCH)

Bahiya Chakiri | November 26, 2019 - 7:45 a.m. EDT / 1:45 p.m. UTC+1 / 6:45 PDT

Register now

Are you 5G ready? Lessons learned from the first 5G deployments

Guillaume Lavallée | December 10, 2019 - 11 am EDT | 4 pm GMT

Register now

Telco network transformation in the 5G era: maximizing analytics and automation

Dr. Konstantinos Stavropoulos | December 12, 2019 - 8 am San Francisco / 11 am New York / 4 pm London

View all

Glossary

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0-9

Videos

Success stories

EXFO and Zain unlock the value of network data to boost CX and revenues

Alternate Text

Hawaiki ushers in a new era of digital communications in the Pacific

Alternate Text

Certifying 5G equipment vendors

View all

Transformations

To add favorites to a list, you must be logged in to your account.

Login Register

Corporate
Investors
Careers
Partners
Suppliers
Products
Field network testing
Lab and manufacturing testing
Service assurance
Solutions
Communications service providers
Wireline
Wireless
Service assurance
Contractors
Managed services, installation and maintenance
Academic and research institutions
Cable MSO (multiple system operator)
Wireline
Service assurance
Network equipment manufacturers
Physical layer and network protocol testing
Wireless lab emulation and testing
Webscale companies and data centers
Physical layer and network protocol testing
Network optimization
Government
System integrators
Support
Services
Training
Field network testing
Lab and manufacturing testing
Service assurance
How to buy
Resources
Technical documentation
Promotional documentation
Legal documentation
Videos
Transformations
Contact
English

Glossary

Technology evolves at a rapid-fire pace. That’s why we’ve built an easy-to-use glossary to help you better understand the terms, technologies and trends that impact your business.

Quadruply Clad Fiber

Return to glossary

A singlemode optical fiber designed with four separate claddings, where each cladding has a refractive index lower than that of the core, resulting in lower macrobend loss and moderately lower dispersion.